"Lord Vader." He's used to correcting the various flotsam he hires for his plans, with their irreverence or pure ignorance of titles, but likewise there is no way this man can know his name after the meddling of the train's controllers. He won't hold it against him, this time.

He does not hold the fear against him either. It would be foolish to resent a desired effect.

"Perhaps you have been awaiting the right... circumstances."